Finding the Fourth Proportional to 256,196.10, 384,528.53 and 129,923.52

Step by Step Solution

1. Step 1: Write the proportion equation
   256,196.10 : 384,528.53 = 129,923.52 : x
2. Step 2: Convert to fraction form
   256,196.10/384,528.53 = 129,923.52/x
3. Step 3: Cross multiply
   256,196.10x = 384,528.53 × 129,923.52
4. Step 4: Simplify right side
   256,196.10x = 49,959,300,158.03
5. Step 5: Solve for x
   x = 49,959,300,158.03/256,196.10
6. Step 6: Final answer
   x = 195,004.14